5.2- controlling reactions

rate of reaction equation

amount/time

factors effecting rate of reaction

temperature, surface area to volume ratio, concentration and pressure (gasses)

how does increasing the temperature increase rate of reaction

temperature is measure of average kinetic energy, increasing the temperature increases the kinetic energy and therefore particles will be moving with more energy resulting in more frequent and energetic collisions and consequently an increased likelihood of more successful collisions

increasing concentration and surface area increases the ……….. of collisions

frequency

catalysts are

substances that speed up the rate of reaction without being changed or used up in the reaction

how do catalysts speed up the rate of reaction

provide an alternative pathway to start a reaction so less activation energy is required

example of biological catalysts

enzymes